MEETINGS. 7 



Archcean system. He then went on to speak of the Jersey 

 argillites, which had been identified with the schists de St. Lo, 

 and which were considered to be the basement beds of the 

 Cambrian formation. 



An interesting and animated discussion followed the 

 reading of the paper. 



Mr. A. Collenette then read the following short note on 

 " The occurrence of soft clay in the form of pentagonal 

 crystals " : — 



During the excavation of a well at the Ville-au-Roi during the 

 summer of 1882, I noticed that the clay thrown out by the labourers 

 in compact shovelfuls broke, on falling to the ground, into well- 

 marked pentagonal shapes. One of these pieces, taken at hazard, 

 I picked up and retained. Its measurement is as follows : 2f inches, 

 width If inches. It has five sides roughly equal. The clay 

 undoubtedly presents an example of the effects of geological pressure 

 in the formation of cleavage lines. It deserves to be examined 

 chemically. Its colour and weight appear to be different from the 

 usual brick clays of the island. There is no doubt a large deposit 

 in situ. 



The clay crystal referred to has been presented by Mr 

 Collenette to the Museum. Mr. R. Spencer had prepared 

 a paper on "A Dredging Excursion off Guernsey," but the 

 writer being unable to be present at the meeting, the paper 

 was read by Mr. G. Derrick. It was written in a lively, chatty 

 style, and was much enjoyed. 



Hearty votes of thanks were accorded to Mr. De La Mare 

 and Mr. Spencer. 



Monthly Meeting held January 12th, 1890, Mr. J. Whitehead, 

 Vice-President, in the chair. 



The attendance of members was unusually large. The 

 minutes of the last meeting having been read and confirmed, 

 the following ladies and gentleman were elected members of 

 the Society, namely, Miss M. B. Collings, Miss B. Carre, 

 Mrs. Noble, and Mr. F. G. Taylor. Mrs. J. Gardner, Mr. H. 

 Cumber, jun., and Mr. A. Burgess, were proposed for election 

 at the next meeting. The formal business of the evening 

 over, Mr. F. Rose, F.D.S., read the first section of a paper on 

 " Some notable Oral Equipments in the Vertebrata." In this 

 section, Mr. Rose dealt with the cold-blooded vertebrates. 

 Introducing his subject with a general description of the 

 human tooth, and its implantation in the jaws, he went on to 

 describe the homologies of the teeth of various classes of 



